The FXX-K was unveiled at Yas Marina Circuit in late 2014. Forty units were built, each sold exclusively to existing Ferrari clients invited into the programme by the manufacturer. The "K" in the name refers to KERS — Kinetic Energy Recovery System — the hybrid energy recovery technology the car shares with Formula 1 terminology, signalling the direct lineage from Ferrari's racing programme.
The car is built on the LaFerrari (Ferrari project code F150), itself Ferrari's first hybrid production car and one of three hypercars — alongside the McLaren P1 and Porsche 918 Spyder — collectively described in the automotive press as the "Holy Trinity." The LaFerrari used a 6.3-litre naturally aspirated V12 combined with a KERS hybrid unit, with Ferrari applying technology derived from its Formula 1 programme to the road car. The FXX-K takes that foundation and develops it for closed-circuit use with no road-car constraints on aerodynamics, noise, or weight.
The FXX-K produces a combined total of 1,050 PS (772 kW; approximately 1,036 hp). This comes from 860 PS delivered by the naturally aspirated V12 internal combustion engine and 190 PS from the electric motor, operating together through the transmission. Torque exceeds 900 N⋅m. Dry weight is 1,165 kg.
Aerodynamically, the FXX-K generates 540 kg of downforce at 200 km/h. The aerodynamic package includes active elements: the rear wing adjusts position under braking and acceleration to manage the balance between drag and downforce independently of the driver. Top speed is quoted at 350 km/h.
The car's electronic management systems are derived from Ferrari's Formula 1 research: an electronic differential (E-Diff), the F1-Trac traction control system, and racing ABS are all present, controlled via a Manettino dial on the steering wheel. Four driving modes are available — Qualify, Long Run, Fast Charge, and Manual Boost — allowing the driver and Ferrari's trackside engineers to configure hybrid deployment strategy for different conditions or session types.
The FXX-K is part of Ferrari's Client Test Driver programme, under which Ferrari retains ownership of the cars and transports them to designated events worldwide. Owners participate in structured test days at circuits, with Ferrari engineers collecting performance data from each car. That data informs the development of future Ferrari road and racing cars. The arrangement positions the FXX-K simultaneously as an extreme driving experience for invited clients and as a mobile research platform for the manufacturer — a dual role Ferrari had established with earlier XX programme cars.
In October 2017, at Ferrari's Finali Mondiali event in Florence, Ferrari unveiled the FXX-K Evo, an aerodynamic upgrade package made available to existing FXX-K owners. The Evo package increases downforce by 23 per cent compared to the standard FXX-K and by 75 per cent compared to the road-going LaFerrari. It was achieved through a comprehensively revised aerodynamic body including a large fixed rear wing, revised front fascia, and additional bodywork elements across the car. The FXX-K Evo was offered as a retrofit for the existing 40-car fleet rather than as a distinct new model.
In Assetto Corsa, the FXX-K is among the fastest and most aerodynamically demanding cars available. Its combination of extreme downforce, hybrid power delivery, and sophisticated electronic management systems requires significant adaptation from drivers more familiar with conventional machinery. The four driving modes translate into the simulation, enabling different approaches to hybrid power deployment across a lap. The car is most naturally suited to high-speed permanent circuits where its aerodynamic grip can be fully exploited.
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